// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_SERVICE_DEBUG_MARKER_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_DEBUG_MARKER_MANAGER_H_

#include "gpu/gpu_export.h"
#include <stack>
#include <string>

namespace gpu {
namespace gles2 {

    // Tracks debug marker.
    class GPU_EXPORT DebugMarkerManager {
    public:
        DebugMarkerManager();
        ~DebugMarkerManager();

        // Gets the current marker on the top group.
        const std::string& GetMarker() const;
        // Sets the current marker on the top group.
        void SetMarker(const std::string& marker);
        // Pushes a new group.
        void PushGroup(const std::string& name);
        // Removes the top group. This is safe to call even when stack is empty.
        void PopGroup(void);

    private:
        // Info about Buffers currently in the system.
        class Group {
        public:
            explicit Group(const std::string& name);
            ~Group();

            const std::string& name() const
            {
                return name_;
            }

            void SetMarker(const std::string& marker);

            const std::string& marker() const
            {
                return marker_;
            }

        private:
            std::string name_;
            std::string marker_;
        };

        typedef std::stack<Group> GroupStack;

        GroupStack group_stack_;
        std::string empty_;
    };

} // namespace gles2
} // namespace gpu

#endif // GPU_COMMAND_BUFFER_SERVICE_DEBUG_MARKER_MANAGER_H_
